Currently, I have thousands of pictures where I want to get rid of white space around the object, but not inside the object. However, the white space is not constant. See pictures below.
Picture 1 :
Picture 2 :
Picture 3 :
Options like this don't work as they delete all white space in the images
convert image.png -fuzz 10% -transparent white output.png
Any suggestions?
What do you mean by getting rid of the white space? If you mean make it transparent, then in ImageMagick 6, you can do a whole folder of images using the mogrify command as follows:
The process involves padding the image with 1 pixel border of white to ensure white is all around. Then doing a fuzzy flood fill. Then remove the extra one pixel all around. I have assumed that the background color is nearly white. Change the fuzz value as desired.
Create a new directory to hold the output (or backup your input directory)
Change directory to the one holding your input images
mogrify -path path_to/outdirectory -format png -bordercolor white -border 1 -fuzz 20% -fill none -draw "matte 0,0 floodfill" -shave 1x1 *.png
Here are the resulting images.
Of course you will have to download them to see that they are transparent.
Note that the images that I downloaded were JPG. So if your images are jpg and not png as in your command, then change *.png to *.jpg. Or just use * to change all formats.
See
https://imagemagick.org/Usage/basics/#mogrify
https://imagemagick.org/Usage/draw/#matte
If using ImageMagick 7, change matte to alpha and change mogrify to magick mogrify.
Related
I have around 2500 images. Some of them contains border while others arent. What I want to accomplish is to add border to the ones that doesn't have any.
Images with border are 64x64 and images without border are 56x56
I prepared a border image file with size of 64x64 in PNG format and I want to merge all files without border within this image to get them borders and output them as PNG format aswell.
I have tried several ways using ImageMagic but no luck so far.
If you make a 64x64 lime-magenta gradient as background.png and a solid blue 56x56 image as foreground.png like this:
magick -size 64x64 gradient:lime-magenta background.png
magick -size 56x56 xc:blue foreground.png
Your command to paste the foreground into the centre of the background is as simple as:
magick -gravity center background.png foreground.png -composite result.png
I figured out it's pretty doable with convert tool from the ImageMagick package.
First I extracted all images with size of 56x56 to different location, then I did the following;
I added 4 pixels on each side since my border is 64x64
for image in ICO_*.png; do
convert -page +0+0 border.png \
-page +4+4 $image \
-background none -layers merge +repage $image-withBorder.png
done
I want to use mogrify to set the background colour of a large number of images to be whatever colour is at a specific pixel, to make them square.
The vast majority have a single colour in the image background, or are photos in front of a single colour (so with only slight variations from shadows, etc.).
(The specific purpose in this case is to make the images all the same size and square for StyleGAN2-ADA training, so I want to avoid big "letterbox" rectangles where possible as it would be seen by the discriminator as relevant to the image, where a more faded-in background that approximately matches would be more likely to be ignored. Specifically, I have thousands of pictures of single dolls and action figures from various sources, some of which are "trimmed out" to have a truly solid colour background, others of which are against solid colour tables/walls/etc, for instance, from eBay images and such.)
Since they do not all have the same colour in the image background (the colour in the image, as opposed to the 'background colour' setting as per ImageMagick's jargon), I need to sample a pixel and set the background, but I can't figure out how. I tried things based on methods used to set the whole image to one colour, to no avail.
I have tried:
mogrify -verbose -resize 1024x1024 -gravity center -background 'p{10,10}' -extent 1024x1024 -resize 256x256 *.jpg
and
mogrify -verbose -resize 1024x1024 -gravity center -background "%[pixel:p{10,10}]" -extent 1024x1024 -resize 256x256 *.jpg
and neither works. I can't find any other possibilities in the documentation.
EDITED TO ADD: While testing various commands I came across a way to modify your original command to make it work on ImageMagick versions as far back as IMv6.8.
mogrify -resize 1024x1024 -set background "%[pixel:p{10,10}]" \
-gravity center -extent 1024x1024 -resize 256x256 *.jpg
The significant difference is setting the background color in an unusual way. Instead of the normal option -background <color>, this command uses -set background <color>. Then it behaves as expected using that +10+10 color as the background in the "mogrify" command.
For ImageMagick v7 use magick mogrify instead of just mogrify.
The following was my original answer. The suggestion for IMv6 "convert" may be quite useful for some workflows, but the answer above seems to be the simplest, most direct route.
PREVIOUS ANSWER:
ImageMagick v6 won't do that inline parsing of the color, but there are ways to get the same result, usually with IM's "convert" in a "for" loop in your shell. I don't know which shell you're using so I don't know how you'd write a "for" loop, but running this command inside the loop on each image should give you the results you described...
convert $image -resize 1024x1024 ( +clone -crop 1x1+10+10 ) +swap \
-resize 1024x1024 -gravity center -composite -resize 256x256 $image
That reads in the image, resizes it, makes a clone inside the parentheses, and extracts that pixel at +10+10. After the parentheses that single pixel get resized to a 1024x1024 square. Then setting the gravity to "center" and compositing the input image over that colored square gives you the result you described.
I know it is possible to trim all transparency around image to make image smaller and contain only the image. But is it also possible to somehow know the location of "box", that contains the image?
For example I have 100x100 transparent image, which contains something at 10x10 box having topleft corner at x=15,y=15. Rest is all transparent.
I'd like to end up with 10x10 image, all transparency around trimmed, but also having that 15,15 information. Those are probably 2 separate actions. How do I do this in a script?
Just fyi - I am having bunch of images like this and they are layers, that I need to trim and stack onto eachother to make them clickable.
There are lots and lots of words but no image in your question so I am trying to guess what you want. I made this input image:
magick -size 100x100 xc:black -fill white -draw "rectangle 10,20 50,80" image.png
And I think you want to know the trim box, which is where it would trim to if you ran -trim:
magick image.png -format "%#" info:
41x61+10+20
So that's a 41x61 box with the top-left at (10,20).
I have an image in .jpg format with white background color. I want to remove the white background color to transparent in Imagemagick. I tried many ways but still the white background can not be removed. Can some one help me to solve this.
You cannot have transparent background colors in your JPEGs. The JPEG file format doesn't support transparency.
If you need transparent background, you need to convert the JPEG to
either PNG (high quality, filesize possibly larger than JPEG)
or GIF (in case you can tolerate low quality and a range of maximally 255 colors).
Example command:
convert your.jpg -transparent white your.png
First, you need to convert the image format from .jpg to .png format, because JPEG does not support transparency. Then use this command:
convert image1.png -fuzz 20% -transparent white result.png
The -fuzz option allows the specified percentage deviation from the pure white colour to be converted to transparent as well. This is useful, for example, when your image contains noise or subtle gradients.
I just found a very neat thing!
magicwand 1,1 -t 20 -f image -r outside -m overlay -o 0 image.jpg imgOutput.png
It is a Fred Weinhaus bash script that can be downloaded from here (for non commercial use only). Also there has about 250 scripts!! and this one is amazing! it did exactly the trick, to remove all background while keeping the inner image dots untouched!
At his page, there are several images as examples so you pick what you need to put on the command line!
The initial position 1,1 is a general guesser saying all the contour is background.
Pay attention that the output must be ".png"
This is my solution without magicwand (replace magick by convert for im < 7.0):
magick img.png -fuzz 20% -fill none -draw "alpha 1x1 floodfill" result.png
Get the background automatically and remove it :
bg=$(convert input.png -format "%[pixel:p{0,0}]" info:)
convert input.png -fuzz 20% -transparent "$bg" output.png
I'd like to use the ImageMagick convert tool to automatically generate a toolbar bitmap from several png images.
I'm using the following command line:
convert.exe -resize 32x32 #imagelist32.txt +append BMP3:toolbarlarge.bmp
with imagelist32.txt containing a list of png files (each one being one toolbar button).
This works, but the resulting bitmap uses black for the transparent color and white as the background color. I would need both colors to be RGB(192,192,192). Like if there was already an image with that background color, and the png images would be drawn on that background.
How can I do that? I've tried adding the -background #C0C0C0 and -transparent-color #C0C0C0 parameters but it didn't work - maybe I put them in the wrong order?
I know you've probably resolved it by your own, but I've been playing a bit with converter.exe some time ago, so I hope this is what you were looking for.
Set the -alpha parameter to the background flag, what means that every fully transparent pixel will be set to the background color, while leaving it fully transparent.
And set also the -background to a certain color RGB(192,192,192), so the previously transparent pixels will get this color.
convert.exe -resize 32x32 -alpha background -background RGB(192,192,192) #imagelist32.txt +append BMP3:toolbarlarge.bmp